Question

why does lower part if leaf lose more water ?

Answer 1

because it has pad like structure and it's not ideal for water storing.So, it loose more water in transpiration

Answer 2

It is due to the process called transpiration. Transpiration is the loss of water from leaves, stems, etc. in the form of water vapor. ... Therefore, the upper surface of the leaf is covered with a thicker cuticle as compared to the lower surface. Hence, the upper surface of the leaf is shinier than the lower surface.